I would like to play the entire city without playing through the game, I only play for sentimental reasons (for the good old days). I would like to unlock the whole city, and there is no "cheat code" for this.

I won't play multiplayer or do any other thing with this. I only play single player once in a while.

So is there a cheat engine that lets me use the entire map?
or a game I could download and load?

This site looks like it's got some good ones - you can take one with 100% completion, or start from earlier in the game if you so choose.
– agent86Feb 10 '12 at 14:28

the save game is awesome! I can change almost everything! I can't edit the "accomplished missions" (I've set it to complete, but I still get a level 4 star if I go anywhere, where I'm not allowed to. And the "fog" in the map is still there.
– AlvarFeb 10 '12 at 16:18

As i said, i haven't tried the editor. Haven't played GTA SA since years. Maybe you want to use the "Lock Wanted Level"-Cheat to keep the cops away. Dunno which type of gamingstyle you are on to
– StreunerFeb 10 '12 at 16:57

I want to "free play" the game so I want to be able to buy every house and so on. so just getting rid of the cops spoils the point...
– AlvarFeb 10 '12 at 19:19

the problem is when I load the "100% done" game I start at the begging with the bike, and still have all the missions to go through! so it doesn't work. Sorry! :(
– AlvarFeb 10 '12 at 15:11

I got none of them working, as soon as I loaded them the game started from the beginning. But thanks for trying! :)
– AlvarFeb 10 '12 at 20:54

Sure, I wonder why your game is behaving like that. Maybe you should ask a new question about this bug, probably something to do with your PC setup. Also, are you sure you are placing the save files in the right directory?
– Aditya M PFeb 10 '12 at 21:08

it's in the correct directory I can see them in game and load them, but when I load them I just start from the beginning. my pc setup is windows 7 and I'm playing via Steam.
– AlvarFeb 10 '12 at 21:17

2

this works perfectly ona GTA version that's not from STEAM. Just so everyone knows.
– AlvarAug 19 '12 at 10:59

I managed to edit a saved map with the GTA San Andreas Save Game Editor and change my "first safehouse" to different areas, and then go ahead buy a new one and then just change my first safehouse again and do so. This made me be able to own every house in the game, this was the result I was after. I just hoped for a faster and easier result. But thanks everyone! :)

I haven't got the final part of the map working. When I enter the monstertruck at one of my "girlfriends" workshop the game just crashes. So I guess there is a problem with my method on unlocking the whole map.

I know this post is pretty old by now but another option, (I'm not 100% sure if it removes the barricades or the wanted level) is to start a new game, then while you're in the cutscene where you're in the back of the police car enter the spawn jetpack cheat. Then when they kick you out of the car instead of spawning normally you'll get the "wasted" message and spawn at the Los Santos hospital. From there you're free to explore and or play the game as normal with the exception that every door is unlocked (including some mission specific ones).